US4874903A - Shielding panel - Google Patents
Shielding panel Download PDFInfo
- Publication number
- US4874903A US4874903A US07/199,715 US19971588A US4874903A US 4874903 A US4874903 A US 4874903A US 19971588 A US19971588 A US 19971588A US 4874903 A US4874903 A US 4874903A
- Authority
- US
- United States
- Prior art keywords
- silver
- silver layer
- layers
- panel
- panes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10743—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing acrylate (co)polymers or salts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/18—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against harmful radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/414—Translucent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
Definitions
- the invention relates to translucent electromagnetic shielding panels, that is translucent panels for shielding against electromagnetic interference or eavesdropping, which incorporate silver coatings to attenuate electromagnetic radiation.
- coatings comprising thin silver layers on glass or plastics substrates to reflect infra red radiation, or to carry an electric current which heats the coated substrate, for example to demist the substrate. It has also been proposed to use the coated panes, with the silver layer electrically connected to earth all around the periphery of the pane, as an electromagnetic shielding panel to inhibit the transmission of electromagnetic radiation; in particular, to inhibit the entry of extraneous electromagnetic radiation liable to interfere with the operation of electric equipment behind the pane, and the escape of electromagnetic radiation carrying sensitive information from electrical equipment such as computers and word processors behind the pane, while allowing the passage of visible light through the pane. Such coatings are usually used for shielding against electromagnetic radiation having a frequency in the range 20 MHz to 10000 MHz.
- the thicker the silver layer the greater the attenuating effect of the coating.
- the visible light reflection of the coating also increases and the light transmission of the coating falls. It would be desirable to produce an electromagnetic shielding panel having a lower reflection, and preferably a higher light transmission, for a given electromagnetic shielding effect than is obtained using known silver coatings.
- EP-A 0 207 181 relates to laminated safety glass with dual heat reflecting layers. It is concerned with the problem of duplicated virtual images ("ghost images") which appear when a pane carrying a highly reflecting layer is formed into a laminate. According to the invention, the problem is overcome by incorporating two heat reflecting layers into the laminate, one on each side of the interlayer. According to EP-A 0 207 181, the heat reflecting layer preferably has a thickness of at least 40 nm and is made of a material selected from gold, silver, palladium, nickel, chromium, aluminium, titanium and oxides thereof.
- the patent specification is particularly concerned with laminates with a thickened interlayer to prevent shattering and, while it refers to an interlayer thickness of 0.1 mm to 50 mm, the problem of "ghost images" only becomes at all significant at interlayer thicknesses of 1 mm or more and with highly reflecting thick coatings.
- UK 915 518 describes the use of a plastic radiation screen behind a window, the screen carrying a coating of metal, for example gold, platinum or nickel, to control the passage of visible light while almost completely reflecting the long wave infra red radiation of 300° K.
- a plastic radiation screen behind a window the screen carrying a coating of metal, for example gold, platinum or nickel, to control the passage of visible light while almost completely reflecting the long wave infra red radiation of 300° K.
- two identical radiation screens are stuck to one another on their metal coated sides by an adhesive permeable to light. The use of the two screens is said to provide the additional effect that radiation falling on the screen on the room side will be reflected back into the room.
- an electromagnetic shielding panel of reduced light reflection for a given electromagnetic attenuation may be obtained by using two separate relatively thin silver layers in place of a single thicker silver layer.
- a translucent electromagnetic shielding panel including at least one pane of glass or plastics and two silver layers each up to 30 nm thick, whereby the panel has a lower reflection for visible light than a panel having a single thicker layer of silver having an equivalent electromagnetic shielding effect.
- the panel preferably comprises two opposed spaced panes each of glass or plastics and each carrying a silver layer.
- each pane carries the silver layer on its surface which faces the other pane.
- the panes are laminated together by an interlayer between them or simply spaced apart with an air (or other gas) space between them.
- an interlayer When an interlayer is used between the panes to form the laminate, it will usually have a thickness of less than 0.8 mm, although the thickness may be increased up to 11 mm in circumstances when it is required to obtain a degree of absorption of electromagnetic radiation by the interlayer.
- Each silver layer is preferably sandwiched between two anti-reflection layers.
- a method of reducing the transmission of electromagnetic radiation having a frequency in the range 20 to 10000 MHz comprising incorporating a panel according to the invention in the path of said radiation with the coatings electrically connected to earth around the periphery of the panel by electrical connection means.
- FIG. 1 is a plan view of a panel in accordance with the invention.
- FIG. 2 is a sectional view on the line Z-Z1 of the panel of FIG. 1, with the coating layers increased in thickness for clarity;
- FIG. 3 is a sectional view of a panel in accordance with the invention incorporating an air space.
- a translucent electromagnetic shielding panel generally designated 1 comprises two panes of clear glass 2,3 laminated together by an interlayer 4. Each of the panes carries a coating 5,6 on its major surface which faces the interlayer.
- the coatings 5,6 each comprise a central silver layer up to 30 nm thick sandwiched between two anti-reflection layers 11 (shown only in FIG. 2).
- the anti-reflection layers may be layers of metal ox examples of metal oxide which may be used include titanium oxide, tin oxide, indium tin oxide, zinc oxide and bismuth oxide.
- the anti-reflection layers will generally have a thickness in the range 20 nm to 60 nm, the thicknesses in any particular case being optimised having regard to the thickness of the silver layer to provide, so far as possible, the desired optical properties (for example, high light transmission, neutral colour).
- Borders 7,8 of fine electrically conductive mesh are incorporated between each of the coatings 5,6 and the interlayer in contact with the coatings all around the periphery of the panel and extending beyond the edge of the panel in order to make electrical contact with the silver coatings, for example in order to connect the coatings to earth.
- the electroconductive mesh is a fine mesh in order to ensure a uniform electrical potential over the whole border of the coated pane; it preferably has a mesh size of less than 5 mm, and is of metal wire.
- the width of the border formed by the electroconductive mesh overlapping the coated pane is not critical providing it is sufficient to achieve satisfactory electrical contact with the elctroconductive coating; it will usually be at least 5 mm wide, but not more than 25 mm wide.
- the panels of the invention may be produced by laminating together the panes of coated glass or plastics with an interlayer.
- the interlayer is conveniently of polyvinylbutyral but other interlayer materials (for example polyurethane, and ⁇ cast-in-place ⁇ acrylic resins which cure in situ between the panes) may be used if desired.
- an interlayer thickness of less than 0.8 mm is satisfactory and preferred for reasons of cost.
- this interlayer thickness is increased up to 11 mm when it is required to obtain a degree of absorption of electromagnetic radiation passing through the interlayer.
- the panes may be coated by magnetically enhanced sputtering, for example as described in GB No. 2 129 831B, and cut to size.
- the borders of conductive mesh are formed by providing strips of wire mesh along the four edges of each of the panes so that they overlap at the corners when the laminate is being made up. They will usually become embedded in the interlayer during the laminating process.
- the mesh is used to make a mechanical electrical connection from all around the silver coatings and provide an electrically conductive path to earth E as illustrated in FIG. 2 and FIG. 3.
- the invention is illustrated but not limited by the following Examples which illustrate the advantages of the invention over the use of single thicker silver layers.
- a panel as illustrated in FIGS. 1 and 2 of the accompanying drawings comprises two panes of clear 3 mm float glass each carrying a coating comprising a layer of silver sandwiched between two anti-reflection tin oxide layers made by the process described in UK 2 129 831B using a thin layer of aluminium between the silver layer and the overlying metal oxide layer.
- the silver layer was approximately 8.5 nm thick giving a sheet resistance of 10 ohms per square.
- the panes were laminated together by autoclaving using a polyvinylbutyral interlayer 0.38 mm thick and borders of WRAPSHIELD knitted wire mesh (available in commerce from RFI Shielding Limited of Braintree, Essex, England) between the interlayer and each of the coated glass surfaces.
- the light reflection and transmission of the resultant laminates were measured using a CIE Illuminant C source, and the attenuation of the panel to the transmission of electromagnetic radiation through the panel in a direction normal to the panel surface was determined over the frequency range 20 to 10000 MHz.
- the results obtained were as follows:
- Example 2 The procedure of Example 1 was repeated to compare the light reflection and transmission of a laminate of two panes of coated glass (each coating including a silver layer having a sheet resistance of 5 ohms per square - corresponding to a thickness of 13 nm silver - sandwiched between tin oxide anti-reflection layers), with a similar laminate of similar shielding effectiveness (31 dB) of one pane of uncoated glass and one pane of coated glass, the coating incorporating a thicker silver layer.
- the results obtained were:
- FIG. 3 A sectional view of such a panel 1 is shown in FIG. 3, where corresponding components of the panel shown in FIG. 1 and FIG. 2 are identically designated.
- the panel incorporates an air space 10 instead of an interlayer 4.
- This air space 10 is defined by a spacer means 9 which is located between the panes 5 and 6 and which extends all around the periphery of the panel.
- the borders of fine electrically conductive mesh 7 and 8 are trapped between the spacer means 9 and the coatings 5 and 6 respectively all around the periphery of the panel.
- Panels in accordance with the invention may be used, for example, for glazing the windows of buildings, serving as viewing panels in enclosures for housing electronic equipment, for instance, in electronic apparatus racks/cubicles, and serving as viewing windows in front of electronic apparatus such as v.d.u.'s (visual display units).
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
Description
______________________________________ Laminate of Laminate with two coated single coated panes pane ______________________________________ Light reflection 19% 25% Light transmission 61% 63% ______________________________________
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878713437A GB8713437D0 (en) | 1987-06-09 | 1987-06-09 | Shielding panel |
GB8713437 | 1987-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4874903A true US4874903A (en) | 1989-10-17 |
Family
ID=10618598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/199,715 Expired - Fee Related US4874903A (en) | 1987-06-09 | 1988-05-27 | Shielding panel |
Country Status (6)
Country | Link |
---|---|
US (1) | US4874903A (en) |
EP (1) | EP0299607A1 (en) |
JP (1) | JPS645099A (en) |
KR (1) | KR890001414A (en) |
AU (1) | AU607217B2 (en) |
GB (2) | GB8713437D0 (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5594615A (en) * | 1993-05-10 | 1997-01-14 | Mti, Inc. | Method and apparatus for reducing the intensity of magenetic field emissions from display device |
US5995854A (en) * | 1993-03-11 | 1999-11-30 | Leslie R. Wilson | Accessory for a mobile communication device |
US6049037A (en) * | 1997-04-01 | 2000-04-11 | U.S. Philips Corporation | Picture display device with emission-reducing means |
US6229085B1 (en) * | 1996-03-13 | 2001-05-08 | Yukio Gotoh | Electromagnetic wave leakage attenuation filter |
US6787204B2 (en) * | 1999-04-28 | 2004-09-07 | Saint-Gobain Glass France | Multiple glazed insulating unit, especially for an aircraft window, with electromagnetic armor |
US6809254B2 (en) | 2001-07-20 | 2004-10-26 | Parker-Hannifin Corporation | Electronics enclosure having an interior EMI shielding and cosmetic coating |
CN101321665B (en) * | 2005-12-02 | 2012-05-23 | 波音公司 | Conductive gasket apparatus and method |
US20130026296A1 (en) * | 2010-04-19 | 2013-01-31 | Mitsubishi Aircraft Corporation | Cockpit window of aircraft having electromagnetic shield, and aircraft |
CN105863468A (en) * | 2016-05-20 | 2016-08-17 | 株洲合力电磁技术有限公司 | Shielding and protection integrated door |
US10673121B2 (en) | 2014-11-25 | 2020-06-02 | View, Inc. | Window antennas |
US11054711B2 (en) | 2014-11-25 | 2021-07-06 | View, Inc. | Electromagnetic-shielding electrochromic windows |
US11114742B2 (en) | 2014-11-25 | 2021-09-07 | View, Inc. | Window antennas |
US11205926B2 (en) | 2009-12-22 | 2021-12-21 | View, Inc. | Window antennas for emitting radio frequency signals |
US11342791B2 (en) | 2009-12-22 | 2022-05-24 | View, Inc. | Wirelessly powered and powering electrochromic windows |
CN114728502A (en) * | 2019-11-18 | 2022-07-08 | 旭硝子欧洲玻璃公司 | Laminated glazing |
US11579571B2 (en) | 2014-03-05 | 2023-02-14 | View, Inc. | Monitoring sites containing switchable optical devices and controllers |
US11631493B2 (en) | 2020-05-27 | 2023-04-18 | View Operating Corporation | Systems and methods for managing building wellness |
US11630366B2 (en) | 2009-12-22 | 2023-04-18 | View, Inc. | Window antennas for emitting radio frequency signals |
US11732527B2 (en) | 2009-12-22 | 2023-08-22 | View, Inc. | Wirelessly powered and powering electrochromic windows |
US11740529B2 (en) | 2015-10-06 | 2023-08-29 | View, Inc. | Controllers for optically-switchable devices |
US11750594B2 (en) | 2020-03-26 | 2023-09-05 | View, Inc. | Access and messaging in a multi client network |
US11796885B2 (en) | 2012-04-17 | 2023-10-24 | View, Inc. | Controller for optically-switchable windows |
US12087997B2 (en) | 2019-05-09 | 2024-09-10 | View, Inc. | Antenna systems for controlled coverage in buildings |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8702357D0 (en) * | 1987-02-03 | 1987-03-11 | Pilkington Brothers Plc | Coated glass |
GB8918859D0 (en) * | 1989-08-18 | 1989-09-27 | Pilkington Plc | Electromagnetic shielding panel |
US5146059A (en) * | 1989-12-15 | 1992-09-08 | Goldstar Co., Ltd. | Microwave leakage shielding device for a microwave oven door |
JPH071837Y2 (en) * | 1989-12-19 | 1995-01-18 | 旭硝子株式会社 | Electromagnetic shield double glazing structure |
WO1998013850A1 (en) | 1996-09-26 | 1998-04-02 | Asahi Glass Company Ltd. | Plasma display protective plate and its manufacturing method |
US6084705A (en) * | 1996-12-23 | 2000-07-04 | Optical Coating Laboratory, Inc. | Methods and apparatus for providing a near-IR emission suppressing/color enhancing accessory device for plasma display panels |
WO1998044771A2 (en) * | 1997-04-01 | 1998-10-08 | Koninklijke Philips Electronics N.V. | Picture display device with emission-reducing means |
DE69817263T2 (en) * | 1997-06-19 | 2004-07-15 | Sumitomo Chemical Co., Ltd. | Front screen for plasma display |
EP0992032A4 (en) * | 1997-06-25 | 2000-07-26 | Viratec Thin Films Inc | Display panel filter and method of making the same |
US6353501B1 (en) | 1999-01-21 | 2002-03-05 | Viratec Thin Films, Inc. | Display panel filter connection to a display panel |
US7405872B2 (en) * | 2003-05-28 | 2008-07-29 | Astic Signals Defenses Llc | System and method for filtering electromagnetic transmissions |
KR100688363B1 (en) * | 2003-09-12 | 2007-03-02 | 신닛뽄세이테쯔 카부시키카이샤 | Magnetic shield panel |
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US2920174A (en) * | 1957-06-28 | 1960-01-05 | Raytheon Co | Microwave ovens |
GB915518A (en) * | 1958-11-12 | 1963-01-16 | Holger Lueder | Radiation screens for windows |
US3260832A (en) * | 1963-10-28 | 1966-07-12 | Westinghouse Electric Corp | Oven |
US3604783A (en) * | 1969-06-30 | 1971-09-14 | Dca Food Ind | Microwave cavity viewers |
FR2111108A5 (en) * | 1970-10-08 | 1972-06-02 | Ppg Industries Inc | |
GB1336825A (en) * | 1971-05-03 | 1973-11-14 | Saint Gobain | Process for the production of heat attenuating glass sheets and a glass sheet produced by the process |
EP0059063A1 (en) * | 1981-02-23 | 1982-09-01 | Optical Coating Laboratory, Inc. | Transparent electromagnetic shield and method of manufacturing thereof |
US4447492A (en) * | 1977-11-21 | 1984-05-08 | Occidental Chemical Corporation | Articles having an electrically conductive surface |
GB2129831A (en) * | 1982-09-21 | 1984-05-23 | Pilkington Brothers Plc | Low emissivity coatings on transparent substrates |
EP0207181A1 (en) * | 1985-06-29 | 1987-01-07 | Chii-Hsiung Lin | Safety glass with dual heat reflecting layers |
US4670347A (en) * | 1986-03-12 | 1987-06-02 | Topflight Corp. | RFI/EMI shielding apparatus |
EP0226151A1 (en) * | 1985-12-09 | 1987-06-24 | Southwall Technologies, Inc. | Multiple pane glass unit with electrically conductive transparent film for use as radiation shield |
US4758686A (en) * | 1987-05-20 | 1988-07-19 | Shimizu Construction Co., Ltd. | Electromagnetic shield structure for building windows |
US4760456A (en) * | 1986-06-09 | 1988-07-26 | Liang Paul M | Conductive screen for cathode ray tubes |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10205822A1 (en) * | 2002-02-13 | 2003-09-04 | Soehnle Waagen Gmbh & Co Kg | Measuring device for a body analyzer scale |
-
1987
- 1987-06-09 GB GB878713437A patent/GB8713437D0/en active Pending
-
1988
- 1988-05-16 AU AU16176/88A patent/AU607217B2/en not_active Expired - Fee Related
- 1988-05-25 GB GB08812395A patent/GB2205527A/en not_active Withdrawn
- 1988-05-25 EP EP88304740A patent/EP0299607A1/en not_active Ceased
- 1988-05-27 US US07/199,715 patent/US4874903A/en not_active Expired - Fee Related
- 1988-06-08 JP JP63139579A patent/JPS645099A/en active Pending
- 1988-06-09 KR KR1019880006897A patent/KR890001414A/en not_active Application Discontinuation
Patent Citations (16)
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Also Published As
Publication number | Publication date |
---|---|
KR890001414A (en) | 1989-03-20 |
JPS645099A (en) | 1989-01-10 |
GB8812395D0 (en) | 1988-06-29 |
GB8713437D0 (en) | 1987-07-15 |
EP0299607A1 (en) | 1989-01-18 |
AU1617688A (en) | 1988-12-15 |
AU607217B2 (en) | 1991-02-28 |
GB2205527A (en) | 1988-12-14 |
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